.big_box {
  width: 800px;
  margin: 0 auto;
  display: flex;
}
.box_left {
}
.box_right {
  border: 1px dashed black;
}
.container {
  width: 800px;
  height: 800px;
  margin: 0 auto;
}
.bc1{
  background: url(img/bc_xk.jpg);
  background-size: 800px 800px;
  background-repeat: no-repeat;
}
.bc2{
  background: url(img/bc_cd.jpg);
  background-size: 800px 800px;
  background-repeat: no-repeat;
}
.plane{
  width: 80px;
  height: 80px;
  /* background: red; */
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 70%;
  cursor: pointer;
  position: absolute;
}
.plane1 {
  background: url(img/plane1.png);
  background-size: 80px 80px;
  background-repeat: no-repeat;
}
.plane2 {
  background: url(img/plane2.png);
  background-size: 80px 80px;
  background-repeat: no-repeat;
}
.plane3 {
  background: url(img/plane3.png);
  background-size: 80px 80px;
  background-repeat: no-repeat;
}
.aidPlane {
  width: 200px;
  height: 200px;
  cursor: pointer;
  position: absolute;
  background: url(img/aidPlane.png);
  background-size: 200px 200px;
  background-repeat: no-repeat;
}
.bullent1 {
  width: 30px;
  height: 30px;
  background: url(img/bullet1.png);
  background-size: 30px 30px;
  background-repeat: no-repeat;
}
.bullent2 {
  width: 30px;
  height: 30px;
  background: url(img/bullet2.png);
  background-size: 30px 30px;
  background-repeat: no-repeat;
}
.bullent3 {
  width: 30px;
  height: 30px;
  background: url(img/bullet3.png);
  background-size: 30px 30px;
  background-repeat: no-repeat;
}

.flying {
  width: 50px;
  height: 50px;
  background: url(img/flyingSaucer.png);
  background-size: 50px 50px;
  background-repeat: no-repeat;
}

.boom {
  width: 60px;
  height: 60px;
  cursor: pointer;
  position: absolute;
  background: url(img/boom.png);
  background-size: 60px 60px;
  background-repeat: no-repeat;
}

.data {
  display: flex;
  justify-content: center;
  margin: 0 auto;
  padding: 10px 0;
}
.score {
  font-size: 30px;
}

.contral {
  /* border: 1px dashed black; */
}
.contral .btn {
  width: 100px;
  height: 60px;
  background: rgb(231, 231, 11);
}